Animals in the ocean:
What Animals Live in the Ocean? – WorldAtlas
Boat Design:
http://hvartial.kapsi.fi/coracle/coracle.htm
https://www.boatbuilding.xyz/sailing-management/the-coracle-1.html
Mariana Trench:
Sea Creatures of the Past
In the Proterozoic eon, which lasted for nearly 2 billion years, the life on Earth didn’t live on the land, but in the sea!
Stromatolites: Rocky mounds of micro-organisms.
The only life on Earth were single celled organisms.
600 million years ago, bigger life forms appeared.
Soft bodied organism fossils are hard to find, but Trilobites were found in South Australia. The Proterozoic eon finished 541 million years ago. By this time, the first ‘big predators’ had arrived. Anomalocaris, Pikaia, and Opabinia. This was in the Cambrian eon, which ended 485 million years ago.
Past Sea creatures
By Furman University
A five eyed, prehistoric, many spined predator.
Pikaia
dinosaur.wikia.com
Anomalocaris
crittersquad.com
Food Chains & Food Webs
Every creature and plant on the planet is in a food chain and a food web. A food chain is like this:
Phytoplankton is eaten by Mussels, which are eaten by Starfish, which are eaten by Crabs.
From now on = means is/are eaten by.
Food webs are more like:
Phytoplankton = Zooplankton = Herring = Tuna = Killer Whale.
Phytoplankton = Zooplankton = Herring = Shark.
Phytoplankton = Zooplankton = Squid = Shark.
Phytoplankton = Zooplankton = Humpback Whale.
Phytoplankton = Zooplankton = Mussel = Starfish = Crab.
Phytoplankton = Mussel = Starfish = Crab.
This is only part of the vast Food Web. If, for instance, one of those animals disappeared, it would have a huge consequence on the Food Web. For instance: If Phytoplankton disappears, the Zooplankton will die, causing the wildlife in the ocean to go extinct. If Crabs disappeared, then Starfish would overpopulate the sea, eating all of the pearls, causing their food source to go extinct and Starfish themselves.
So, we must do what ever we can to prevent a Food Web catastrophe happening.